Type-writing machine.



G. H. VOGEL. TYPE WRITING MACHINE. APPLIOATION I'ILBD MAY 3, 19 11.

Patented June 3, 1913.

WITNESSES:

v INVENTO'R:

' H ATTORNEY,

- air to the cylinder.

4 its feeding movement.

UNITED STATES 1,tlti3,624.

Specification of LettersPatent.

Original application filed August 22, 1910, Serial No. 578,457.

1911. Serial No. 624,828.

TYPE-WRITING MAHINE.

Patented J une 3, 1913. Divided and this application filed May 3,

To all whom it may concern Be it known that I, CHARLES H. 706131., a subject of the King of England, residing in Vancouver. in the county of Vancouver, Province of British Columbia, Dominion of Canada, have invented certain new and useful Improvements in Type-\Vriting Machines, of which the following is a specification.

This invention relates to means for feeding and returning the paper carriage of a typewriting machine, and this application is a division of my application No. 578,457, filed August 22, 1910.

The principal object of the invention is to provide simple and etiicient means for exerting a constant and uniform tension upon the carriage, to advance it in its feeding movement, and also to enable the carriage to be easily returned from any point atthe will of the operator.

In carrying out my invention, I employ a pneumatic cylinder, with a piston connected to the typewriter carriage. Compressed air. normally admitted by a valve to one end of the cylinder, advances the carriage for 7 By depressin a special control key, the valve is mover? to reverse the air pressure on the piston, which then returns the carriage.

In the accompanying drawings, Figure 1 is a partial section and front elevation showing the pneumatic device attached to a typewriter carriage. Fig. 2 is a left side view of the typewriting machine, indicating my pneumatic device in position, and illustrating the key connection for controlling the carriage.

A carriage 1 is guided at the rear on rail 8 and has a rack21' pivoted to the carriage at 22 and engaging an escapement inion 23 associated with an escapement w ieel 20. I attach a rod 2 to the carriage 1, to extend in the direction of travel of the carriage, and provide said rod with a iston 3 to reciprocate in a pneumatic cylin er 4 secured to the main frame 8 of the typewrit-' ing machine by a bracket 6.

Fig. 1 shows the normal position of a valve '11, which controls the admission of The air is normally edmittedto air chest 12 through an inlet 17, and from air chest 12 passes throu h port 15 into the end of the cylinder ad avalve 11.

- link 9 with :will' return the valve to its normal cent to the carriage 1. The valve is held in this position. by a compression spring 14 which thrusts against the vertical arm of a bell-crank 10 connected by stem 10 with The air pressure on the right of the piston exerts a pull on the carriage 1, in letter-feeding direction. The opposite end of the cylinder 4 isopen to the atmosphere through port 13, exhaust passage 16-,- and outlet 18. from any point at the willof the operator, I provide a key 7 extending from keyboard 24, fulcrumed at 25, and connected by a the horizontal arm ot'the said bell crank 10. bell crank will rock to the right and draw valve l2'to the right, so as to admit air through port 13 to the left end of the cylinder, and open port 15 to exhaust.

In order to return the carriage By depressing this key, the

The pressure on the piston instantly returns the car before the spring 14 p0S1- air will be admitted in'front of riage. By, releasing the key just carriage is completely returned,

tion, and

.fithe piston, to cushion the carriage as it is arrested. As the return of the its depressed position, point key 7' from and therefore the in the travel of the carriage at which 'the valve is reversed, is under the control of the operator, the return movement of the carriage can be arrested at a point corresponding with the speed at which the carriage is being returned. or example, when the carriage is returned from an intermediate position, the momentum of the returning carriage will be less than when returned after writin a full length line. should thereIo re be released at a later. point in the return travel of the carriage corresponding to the comparatively short distance through which it travels while being brought to rest.

The return of the valve The key being under the control of the operator also permits the carriage to be stopped at any intermediate position in its return movement. vMoreover, the operator may reduce the pressure on the key sufficiently to permit a partial return of the valve and there by throttle the fluid and thusreduce the speed of the carriage. In this way the carriage may begradually slowed down and brought to an; easy stop as its return movement is completed, or may be slowly returned to any intermediate position. The

movement of the valve is limited by a stop 10 in the path of the vertical arm of bell crank 10. When the pneumatic mechanism isoperating as a tension device, to feed the carriage, the pulling force upon the carriage is constant and uniform throughout thfi tire travel of the carriage.

Having now described claim: I 1. A typewriting -machine having a carmy invention, I

ria'ge: in ,co'inbination with a pneumatic cyl inder, a piston rod actuated thereby and attached to said carriage, a'valve cooperating with said cylinder, means for normally holding said valve in a position to cause said piston rod to advance said carriageiri t e" letter-feeding direction, a key for actuating 7 said valve to cause said pistonrodto move said carriage in the reverse direction, and means t9 return gthe key and valve whenever the key is released whereby the point at which the return movement of theoarriage is arrested is under" the control of the operanism'whenever the key is released and sup- Oopies of this patent may be obtained ply pressure to the carriage in letter-feeding direction.

3. In a typewriting machine, the combination with a traveling carriage, of a cylinder, 'a piston therein, a connection between the piston and the carriage, a reversing valve to piston, a controlling key, connections from the key to the valve for moving the valve to "a position to admit pressure for returnin the carriage when the key is depressed, an means operable automatically when the key is released to reverse the valve and apply pressure for moving the carriage forwar '4. In a typewriting machine, the combina- -admit fluid pressure to either side of the tion with a machine frame, of a traveling carriage, a cylinder supported on the-machine frame, a piston working in the 63 1- inder, a piston rod connecting the piston to the carriage, a reversing valve movable into positions to admit pressure at either side'of the piston, a spring to move said valve into position to admit pressure to operate the carriage in letter-feeding direction, a fin er key,

and connections between the key an valve for. moving thedatter against the tension fof the spring into posrtidn-"to admit pressure to return the carr1age.- u

CHARLES H. VOGEL. Witnesses:

G. G. Woonwmm, A. ,EaGALrIN for five cents; each by addressing the Commissioner of Paton;-

-Wash1ngton, 

